//
//  NetworkTools.swift
//  测试-05-AFN Swift
//
//  Created by male on 15/10/15.
//  Copyright © 2015年 itheima. All rights reserved.
//

import UIKit
import AFNetworking

/// HTTP 请求方法枚举
enum HMRequestMethod: String {
    case GET = "GET"
    case POST = "POST"
}


// MARK: 网络工具
class NetworkTools: AFHTTPSessionManager {

    // MARK: - 应用程序信息
    private let appKey = "3483289224"
    private let appSecret = "2c7ee92ecfbc04fd125527926d36867a"
    private let redirectUrl = "http://www.baidu.com"
    
    /// 网络请求完成回调，类似于 OC 的 typeDefine
    typealias HMRequestCallBack = (result: AnyObject?, error: NSError?)->()
    
    // 单例
    static let sharedTools: NetworkTools = {
        
        let tools = NetworkTools(baseURL: nil)
        
        // 设置反序列化数据格式 - 系统会自动将 OC 框架中的 NSSet 转换成 Set
        tools.responseSerializer.acceptableContentTypes?.insert("text/plain")
        
        return tools
    }()
    private var accessDict: [String: AnyObject]? {
        
        if let token = UserAccountViewModel.sharedUserViewMModel.token {
            return ["access_token": token]
        }
        return nil
    }
}
// MARK: - 加载个人微博数据
extension NetworkTools {
    func loadUserInfo(uid: String, finished: HMRequestCallBack) {
        guard var params = accessDict else{
            finished(result: nil, error: NSError(domain: "cys.error", code: -1, userInfo: ["message": "token获取错误"]))
            return
        }
        
        let urlString = "https://api.weibo.com/2/users/show.json"
        params["uid"] = uid
        request(.GET, URLString: urlString, parameters: params, finished: finished)
        
    }
}


// MARK: - OAuth 相关方法
extension NetworkTools {
    
    /// OAuth 授权 URL
    /// - see: [http://open.weibo.com/wiki/Oauth2/authorize](http://open.weibo.com/wiki/Oauth2/authorize)
    var oauthURL: NSURL {
        
        let urlString = "https://api.weibo.com/oauth2/authorize?client_id=\(appKey)&redirect_uri=\(redirectUrl)"
        return NSURL(string: urlString)!
    }
    
    /// 加载 AccessToken
    func loadAccessToken(code: String, finished: HMRequestCallBack) {
        
        let urlString = "https://api.weibo.com/oauth2/access_token"
        
        let params = ["client_id": appKey,
            "client_secret": appSecret,
            "grant_type": "authorization_code",
            "code": code,
            "redirect_uri": redirectUrl]
        
        request(.POST, URLString: urlString, parameters: params, finished: finished)
    }
}

// MARK: - 封装 AFN 网络方法
extension NetworkTools {
    
    /// 网络请求
    ///
    /// - parameter method:     GET / POST
    /// - parameter URLString:  URLString
    /// - parameter parameters: 参数字典
    /// - parameter finished:   完成回调
    private func request(method: HMRequestMethod, URLString: String, parameters: [String: AnyObject]?, finished: HMRequestCallBack) {
        
        // 定义成功回调
        let success = { (task: NSURLSessionDataTask, result: AnyObject) -> Void in
            finished(result: result, error: nil)
        }
        
        // 定义失败回调
        let failure = { (task: NSURLSessionDataTask, error: NSError) -> Void in
            // 在开发网络应用的时候，错误不要提示给用户，但是错误一定要输出！
            print(error)
            finished(result: nil, error: error)
        }
        
        if method == HMRequestMethod.GET {
            GET(URLString, parameters: parameters, success: success, failure: failure)
        } else {
            POST(URLString, parameters: parameters, success: success, failure: failure)
        }
    }
}
// MARK: - 加载微博数据
extension NetworkTools {
    func loadStatus(finished: HMRequestCallBack) {
        //https://api.weibo.com/2/statuses/home_timeline.json
        //只需要一个token即可
        guard let params = accessDict else {
            finished(result: nil, error: NSError(domain: "cys.error", code: -1, userInfo: ["errorMessge": "token为空"]))
            return
        }
        let urlString = "https://api.weibo.com/2/statuses/home_timeline.json"
        request(.GET, URLString: urlString, parameters: params, finished: finished)
    }
}
//MARK: - 发送纯文本微博
extension NetworkTools {
/// - see: [https://api.weibo.com/2/statuses/update.json](https://api.weibo.com/2/statuses/update.json)
    func sendStatus(status: String, finished: HMRequestCallBack) {
        guard var params = accessDict else{
            finished(result: nil, error: NSError(domain: "cys.error", code: -1, userInfo: ["message": "token获取错误"]))
            return
        }
        let urlString = "https://api.weibo.com/2/statuses/update.json"
        params["status"] = status
        request(.POST, URLString: urlString, parameters: params, finished: finished)
    }
}
//MARK: - 发送带图片微博

